Pump.



IVI. T. CHAPMAN.

PUMP.

APPLlcAsoN FILED JULY 8.1914.

1,297,441 Patented Mar. 18,1919.

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NI. T. CHAPMAN.

PUMP.

APPLICATroN FILED JULY 8. i914.

Patented Mal?. 18,1919.-

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MATTHEW T. CHAPMAN, OF AURORA, ILLINOIS, ASSIGNOR TO TI-IE .AMERICAN WELL WORKS, 0F AURORA, ILLINOIS, A CORPORATION OF ILLINOIS.

PUMP.

Specification of Letters Patent.

Patented Mar. 18, 1919.

Application led uly 8, 1914. Serial No. 849,646-

To all 'whom t may concern:

Be it known that I, MATTHEW T. CHAP- MAN, a citizen of the United States, residing at Aurora, in the county of Kane, State of Illinois, have invented certain new andv useful Improvements in Pumps, of which the following is a speciication, reference being had to the accompanying drawings.

My invention relates to pumps and p articularly to that class of pumps employing three independently-actuated plungers. It is one of the objects of my invention to p rovide new and improved means for actuating the plungers of a p-ump of this type by 'the f column of water is kept constantly in motion thus avoidingthe necessity of starting the column of water into motion at each stroke of the plunger. It is another object of my invention to improve devices of this type in sundry details hereinafterpointed out.

In the drawings,-

Figure 1 is a side View of the mechanism at the mouth of the well by which. the plungers are actuated;

Fig. 2 is a front view of the parts shown in Fig. 1;

Fig. 3 is substantially across-section taken on line 3-3 of Fig. 2;

Fig. 4 is a plan view of the crank mechanism; t

Fig. 5 is a cross-section taken on line 5-5 of Fig. 4; and

Fig. 6 is a sectional view showing the connections of the plunger rods with the plungers or pistons below the water in the pump tubing.

Referring to the several gures of the drawings, in which corresponding parts are indicated by the same reference characl-ll indicate standards -connected at then` upper ends by a yoke 12. Mounted inl suitable bearings in the upper ends of the standards 10-11 is a shaft 13 having keyed or otherwise fixed thereon two ,spiral gears 14-15. Mounted in brackets 16 of any suitable type is a shaft 17 havingv fixed thereon spiral gears l8-19 meshing with the gears 14-15, respectively. The shaft 17 is adapted to be driven for the purpose of rotating the gears 14-15 through the medium of a gear 1,9 mounted upon said shaft meshing with a gear 2O mounted upon the shaft of a motor 21 of any suitable type supported from the framework by a bracket 22.

Referring now particularly to Figs. 4 and 5, 23-24 indicate doublearmed brackets fixed upon the shaft 13 having mounted between them at one end a pin 25. Fixed upon the shaft 13 adjacent to the bracket 23 is an arm 26 connected at its outer end to the outer end of one of the arms of the bracket 23 by means of a pin 27. Fixed upon the shaft 13 adjacent to the bracket 24 is an arm 28 having its outer end connected by means of a pin 29 with the outer end of one of the arms of the bracket 24.

Referring now to Fig. 3, 30 indicates a crank-box, which, in the construction shown, is formed of two parts secured together by suitable bolts. The craiik-box 30 is provided with a horizontally-positioned slidebox 3l thereacross along which a slide-block 32 mounted upon the pin 25 is adapted to slide as the pin 25 is revolved about the shaft 13 by the motor 21. The crank-box 30 is also provided with a verticallyspositioned slot 33 sothat the crank-box 30 is adapted to move up and down relative to the shaft 13 as said shaft is rotated. The crank-box 30 is also provided with an upwardly extending. rod 34 which passes through la suitable slide-bearing in the yoke 12, the rod 34 serving to guide and to steady the crank-box 30. Suitably connected to the lowermost portion of the crank-box 30 is a pump rod35 which is connected with a suit-- ably-valved plunger or piston 36 located down in the well within the pump casing 37. 38-39 indicate'crank-boxes similar in a general way to the crank-box 30. The crank-box 38 is provided with a guide rod 40 at its upper end working in a suitable slide-bearing in the yoke 12 and has connected to its lower end a downwardly-extending rod 41. In the slide-box of the crank-box 38 is mounted a slide-block 42 (see comparatively high rafte of speed.

Fig. 1) which works upon the pin 27 whereby the crank-box 38 is reciprocated up and down by said pin 27 as the shaft 13 is rotated. The crank-box 39 is provided with a rod 43 rising from its upper end and having a suitable slide-bearing in the yoke 12, said crank-box being provided at its lower end with a downwardly-extending rod 44. In the slide-box of the crank-box 39 is mounted a slide-box 45 (see Fig. 3) working upon the pin 29, whereby the crank-box 39 is reciprocated up and down by said pin upon the rotation of the shaft 13.

Mounted upon the lower ends of the rods 41-44 is a cross-head 46 adapted to be reciprocated by said rods, together with a hollow plunger rod 47 connected thereto, within which hollow plunger rod 47 the plunger rod 35 is located. .The plunger rod 47 is connected at its lower end with a suitablyvalved plunger or piston 43 located and adapted to be reciprocated in the pump-casing 37 a sho-rt distance above the plunger 36.

Inasmuch as the crank-box 30 does as much work as'the two crank-boxes 38 and 39 together, the crank-box 30 is made considerably wider and heavier than either of the two coperating crank boxes.

Upon the gears 14d15 are mounted wristpins 49-50, respectively, adapted to operate connecting rods 51-52 connected at their lower ends to a cross-head 53 which is slidin the standards 10-1l. The cross-head 53 'has connected to it a hollow pump rod 55 in which the pump rods 35 and 47 are located. The pump rod 55 has mounted upon its lower end a suitably-valved piston or plunger 56 worlring'in the pump casing 37 a short distance above the piston 48.

As is best shown in Figs. 1 and 5, the pin 25, the pins 27 and 29, and sthe pins 49 and 50 are arranged in triangular relation relative to each other,-that is to say, at the points of an equilateral triangle through the center of which the shaft 13 passes. By reason of this arrangement one of the pistons 36-48-56 is being moved upward all of the time during the rotation of the shaft 13, and well before the end of the upward stroke. of each piston the next-succeeding upwardlymoving piston is started on its operative upward stroke, thus keeping one of the three pistons moving upward all of the time at a In this way the column of water is raised at substantially a uniform speed throughout its upward movement, thus avoiding the stopping and starting of the column of water at each stroke.

By the use of spiral gears for driving the shaft 13, theintermeshing gears are maintained continuously in contact thus preventing jar in the operation of the device.

Upon the rotation of the shaft 13, the slide-blocks 32, 42 and 45 are carried by the pins 25, 29 and 27, respectively, around the said shaft, the slide-blocks moving back and forth in the slide-boxes 31. lThe said slideblocks are of such a length that when one of them is extended across the slot 33 of its crank-box the projecting end of the lblocl: is brought into operative engagementwith `the slide-box on the far side ofthe slot before the actuating pin 25, 27 or 29 is brought into alinement with the slot. The device is thus insured against cramping-,and the power is applied very eiiiciently to the plunger rods directly in the line of such rods.-

By reason of my construction and arrangement, 1 have provided for a pump an exceedingly strong actuating mechanism, obtaining a crank motion without th'e necessity for cutting out or offsetting the crank shaft'. So far as I am aware, this Vis new in pumps of this type, and the claim is to be construed accordingly.

While l have-shown my slide-boxes 31 all arranged in horizontal position, it will be understood that I do not wish v to limit myself 'to that particular feature of construction except as-hereinafter specifically claimed, it being understood that the slideboxes may be set at any desired angle without departing from my invention.

Whart I claim as my invention and desire to secure by Letters Patent, yisl In a pump, the combination of a shaft, two arms ixed upon said shaft and extending therefrom, a wrist pin mounted in the ends of said arms and adapted to be revolved about said shaft, two other arms mounted upon said shaft and extending therefromat an angle of approximately 120 degrees from said first-named arms,a second wrist pin mounted in the ends ofy said second-named arms and adapted to be revolved about saidshaft, a slide-block journaled upon each of said pins, slide-boxes in. which said slideblocks are adapted to be reciprocated,each

ofsaid slide-boxes being parted at an inter- Copies of thisA patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

